1. String instruments:
- produce sound when a string is plucked or bowed
- e.g. violin, guitar, harp
2. Wind instruments:
- produce sound when air is blown across a mouthpiece
-e.g. flute, clarinet, trumpet
3. Percussion instruments:
- produce sound when struck with a hand, stick or other object
- e.g. drum, cymbal, xylophone
4. Keyboard instruments:
- produce sound when a key is pressed, which activates a hammer that strikes a string
- e.g. piano, organ, synthesizer
5. Electronic instruments:
- produce sound using electronic circuits
- e.g. synthesizer, sampler, theremin